Accounting Policies [Abstract] Accounting Policies [Abstract] Accounting Standards Update 2015-05 [Member] Accounting Standards Update 2015-05 [Member] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts Payable and Accrued Liabilities, Current Accrued expenses and other payables Accrued expenses and other payables Accounts Payable and Accrued Liabilities Disclosure [Text Block] Accrued Expenses and Other Payables Accounts Receivable, Gross, Current Accounts receivable Accounts Receivable, Net, Current Accounts receivable (net of allowance for doubtful accounts of RMB2,315 and RMB512 (US$74) as of December 31, 2015 and 2016, respectively) Total Accrued Income Taxes, Current Income tax payable Accrued Marketing Costs, Current Accrued expenses Accrued Professional Fees, Current Professional service fees Accrued sales incentive and rebates current. Accrued Sales Incentive and Rebates Current Accrued rebates and cash incentives Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated other comprehensive income AOCI Attributable to Parent [Member] Accumulated other comprehensive income Additional Paid in Capital, Common Stock Additional paid-in capital Additional Paid-in Capital [Member] Additional paid-in capital Adjustable-Rate Financial Products [Member] Adjustable-Rate Financial Products [Member] Adjustable-Rate Financial Products [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Share-based compensation Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income to net cash from operating activities: Advertising Costs, Policy [Policy Text Block] Advertising Expenditures Advertising Expense Advertising expenditures Advertising [Member] Advertising [Member] Advertising Services [Member] The term of each of the entity's Exclusive technical consulting and service agreements. Agreement Term Term of agreement Allocated Share-based Compensation Expense Share-based compensation expense Allowance for Credit Losses on Financing Receivables [Table Text Block] Schedule of Analysis of Allowance for Doubtful Accounts Allowance for Doubtful Accounts Receivable, Current Ending balance Beginning balance Allowance for doubtful accounts Allowance for doubtful accounts Allowance for Doubtful Accounts Receivable, Reversals Allowance for Doubtful Accounts Receivable, Reversals Reversal Allowance for Doubtful Accounts Receivable, Write-offs Write off Amendment Flag Amendment Flag American Depositary Shares [Member] American Depositary Shares [Member] American Depositary Shares [Member] Amortization of Intangible Assets Amortization of intangible assets Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries Restricted net assets Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Anti-dilutive shares excluded from calculation of diluted earnings per share Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Assets Total assets Total assets Assets [Abstract] ASSETS Assets, Current Current assets Total current assets Assets, Current [Abstract] Current assets: Assets, Fair Value Disclosure Assets measured at fair value on recurring basis Assets, Noncurrent Non-current assets Total non-current assets Assets, Noncurrent [Abstract] Non-current assets: Assets, Total [Member] Assets, Total [Member] Autohome E- Commerce Hong Kong Limited [Member] Autohome E- Commerce Hong Kong Limited [Member] Autohome E- Commerce Hong Kong Limited [Member] Autohome E- Commerce Inc [Member] Autohome E- Commerce Inc [Member] Autohome E-commerce Inc. [Member] Autohome Financing Hong Kong Limited [Member] Autohome Financing Hong Kong Limited [Member] Autohome Financing Hong Kong Limited [Member] Autohome Financing Limited [Member] Autohome Financing Limited [Member] Autohome Financing Limited [Member] Autohome HK Limited [Member] Autohome HK Limited [Member] Autohome (Hong Kong) Limited [Member] Autohome Link Hong Kong Limited [Member] Autohome Link Hong Kong Limited [Member] Autohome Link Hong Kong Limited [Member] Autohome Link Inc [Member] Autohome Link Inc [Member] Autohome Link Inc. [Member] Autohome Media Limited [Member] Autohome Media Limited [Member] Autohome Media Limited [Member] Autohome Shanghai Advertising Company Limited [Member] Autohome Shanghai Advertising Company Limited [Member] Autohome Shanghai Advertising Co., Ltd. [Member] Autohome Tianjin Automobile Sales Company Limited [Member] Autohome Tianjin Automobile Sales Company Limited [Member] Autohome (Tianjin) Automobile Sales Co., Ltd. [Member] Autohome Wholly Foreign Owned Enterprise [Member] Autohome Wholly Foreign Owned Enterprise [Member] Autohome WFOE [Member] Award Type [Axis] Award Type [Axis] The item represents thee fees that we pay to telecommunication carriers and other service providers for telecommunication services and for hosting our servers at their internet data centers, as well as fees we pay to our content delivery network service provider for the distribution of our content. Bandwidth and Internet Data Center Costs Bandwidth and internet data center Basis of Accounting, Policy [Policy Text Block] Basis of accounting Beijing Autohome Advertising Company Limited [Member] Beijing Autohome Advertising Company Limited [Member] Beijing Autohome Advertising Co., Ltd. [Member] Beijing Autohome Information Technology Company Limited [Member] Beijing Autohome Information Technology Company Limited [Member] Beijing Autohome Information Technology Co., Ltd. [Member] Beijing Autohome Technologies Company Limited [Member] Beijing Autohome Technologies Company Limited [Member] Beijing Autohome Technologies Co., Ltd. [Member] Beijing Autohome Used Car Appraisal Co Ltd [Member] Beijing Autohome Used Car Appraisal Co Ltd [Member] Beijing Autohome Used Car Appraisal Co., Ltd [Member] Beijing Autohome Used Car Brokerage Co Ltd [Member] Beijing Autohome Used Car Brokerage Co Ltd [Member] Beijing Autohome Used Car Brokerage Co., Ltd. [Member] Beijing Cheerbright Technology Company Limited [Member] Beijing Cheerbright Technology Company Limited [Member] Beijing Cheerbright Technologies Co., Ltd. [Member] Beijing Chezhiying Software Co Ltd [Member] Beijing Chezhiying Software Co Ltd [Member] Beijing Chezhiying Software Co., Ltd. [Member] Beijing Chezhiying Technology Company Limited [Member] Beijing Chezhiying Technology Company Limited [Member] Beijing Chezhiying Technology Co., Ltd. ("Chezhiying WFOE") [Member] Beijing Haochezhijia E-commerce Co., Ltd. [Member] Beijing Haochezhijia E-commerce Co., Ltd. [Member] Beijing Haochezhijia E-commerce Co., Ltd. [Member] Beijing Kemoshijie Technology Co Ltd [Member] Beijing Kemoshijie Technology Co Ltd [Member] Beijing Kemoshijie Technology Co., Ltd. [Member] Beijing Prbrownies Software Company Limited [Member] Beijing Prbrownies Software Company Limited [Member] Beijing Prbrownies Software Co., Ltd. (formerly known as Beijing Autohome Software Co., Ltd.) [Member] Beijing Shengtuo Autohome Advertising Company Limited [Member] Beijing Shengtuo Autohome Advertising Company Limited [Member] Beijing Shengtuo Autohome Advertising Co., Ltd. [Member] Beijing Shengtuo Chengshi Advertising Company Limited [Member] Beijing Shengtuo Chengshi Advertising Company Limited [Member] Beijing Shengtuo Chengshi Advertising Co., Ltd. [Member] Beijing Shengtuo Hongyuan Information Technology Company Limited [Member] Beijing Shengtuo Hongyuan Information Technology Company Limited [Member] Beijing Shengtuo Hongyuan Information Technology Co., Ltd. [Member] The business operation period represents that PRC regulations require any foreign entities that invest in the advertising services industry to have at least a two-year track record with a principal business in the advertising industry outside of China. Business Operation Period Minimum years track record in principal business Capital Expenditures Incurred but Not yet Paid Purchase of fixed assets included in accrued expenses and other payables Capitalized Computer Software, Additions Capitalized internally-developed software development costs Capitalized Computer Software, Amortization Amortization expense for capitalized software costs Capitalized Computer Software, Net Unamortized amount of capitalized internal use software development costs Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of year Cash and cash equivalents at beginning of year Cash and cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Net (decrease)/increase in cash and cash equivalents Net (decrease)/increase in cash and cash equivalents Cash and Cash Equivalents, Policy [Policy Text Block] Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Restricted Cash Cash and cash equivalents, term deposits and restricted cash deposited with financial institutions. Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. Restricted cash is the cash and cash equivalent items which are restricted as to withdrawal or usage. Cash and Cash Equivalents Restricted Cash and Term Deposits Cash and cash equivalents, restricted cash and term deposits Cash, Cash Equivalents, and Short-term Investments Cash and cash equivalents and short term investments Cheerbright International Holdings Limited [Member] Cheerbright International Holdings Limited [Member] Cheerbright International Holdings, Limited [Member] Chengdu Prbrownies Software Co., Ltd. [Member] Chengdu Prbrownies Software Co., Ltd. [Member] Chengdu Prbrownies Software Co., Ltd. [Member] Chengdu Prbrownies software company limited. Chengdu Prbrownies Software Company Limited [Member] Chengdu Prbrownies Software Company Limited [Member] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Class of Stock [Domain] Class of Stock [Domain] Class of Stock [Line Items] Class of Stock [Line Items] Closing price per share. Closing Share Price Closing stock price CHINA China [Member] Commitments and Contingencies Commitments and Contingencies Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Common Class A And B [Member] Common Class A And B [Member] Common Class A And B [Member] Common Class A [Member] Class A Ordinary Shares [Member] Common Class B [Member] Class B Ordinary Shares [Member] Common Stock [Member] Ordinary shares Common Stock, Par or Stated Value Per Share Ordinary shares, par value Common Stock, Shares Authorized Ordinary shares, shares authorized Common Stock, Shares, Issued Ordinary shares, shares issued Common Stock, Shares, Outstanding Ending balance, Shares Beginning balance, Shares Ordinary shares, shares outstanding Number of ordinary shares outstanding Ordinary shares outstanding Common Stock, Value, Issued Ordinary shares Components of Deferred Tax Assets [Abstract] Deferred tax assets Components of Deferred Tax Liabilities [Abstract] Deferred tax liabilities Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income attributable to Autohome Inc. Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest Comprehensive loss attributable to noncontrolling interests Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive income Comprehensive Income, Policy [Policy Text Block] Comprehensive Income Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk, Credit Risk, Policy [Policy Text Block] Concentration of Risk Concentration risk number of major customers. Concentration Risk Number Of Major Customers Number of customers represented greater than 10% Concentration Risk, Percentage Concentration percentage Concentration Risk Type [Domain] Concentration Risk Type [Domain] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Financial Information of Parent Company Only Disclosure [Abstract] Condensed Financial Information of Parent Company Only Disclosure [Text Block] Condensed Financial Information of the Parent Company Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Condensed Income Statement [Table] Condensed Income Statement [Table] Consolidation, Policy [Policy Text Block] Principles of Consolidation Disclosure of accounting policy for the translation rate used for the amounts of the consolidated financial statements purpose solely for the convenience of users of financial statements. Convenience Translation [Policy Text Block] Convenience Translation Cost of Revenue Cost of revenues Cost of revenues Cost of Revenue [Abstract] Cost of Revenue [Abstract] The aggregate cost of goods produced and sold and services rendered during the reporting period. Cost Of Revenues [Text Block] Cost of Revenues Cost of sales, including tax Cost of sales, including tax Cost of sales, including tax Cost of Sales [Member] Cost of Revenues [Member] Cost of Sales, Policy [Policy Text Block] Cost of Revenues Cost of Services, Depreciation and Amortization Depreciation and amortization Cost of Services, Direct Labor and Other Cost of Services, Direct Labor and Other Content-related costs Credit Concentration Risk [Member] Credit Concentration Risk [Member] Currency Concentration Risk [Member] Currency Concentration Risk [Member] Currency Convertibility Risk [Member] Current Fiscal Year End Date Current Fiscal Year End Date Current Income Tax Expense (Benefit) Current Current income tax expense Customer Advances, Current Advance from customers Customer Concentration Risk [Member] Customer Concentration Risk [Member] Customer Deposits, Current Deposit from customers Customer Relationships [Member] Customer Relationships [Member] Database Rights [Member] Websites [Member] Deferred Compensation Share-based Arrangements, Liability, Current Payable for exercise of share-based awards Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Schedule of Prepaid Expenses and Other Current Assets Deferred Income Tax Expense (Benefit) Deferred income taxes Deferred Deferred income tax expense Deferred Tax Liabilities, Gross Total deferred tax liabilities Deferred Revenue, Current Deferred revenue Deferred Tax Assets, Deferred Income Revenue recognition Deferred Tax Assets, Net of Valuation Allowance Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Current Deferred tax assets, current Net current deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Current Classification [Abstract] Current Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Deferred tax assets, non-current Net non-current deferred tax assets Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Classification [Abstract] Non-current Deferred Tax Assets, Operating Loss Carryforwards Tax losses Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards, which will be realized in periods after one year or beyond the operating cycle, if longer. Deferred Tax Assets, Operating Loss Carryforwards, Noncurrent Tax losses Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation Accrued staff cost Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities Accrued expenses Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Allowance for Doubtful Accounts Allowance for doubtful accounts Deferred Tax Assets, Valuation Allowance Less: Valuation allowances Deferred Tax Assets, Valuation Allowance, Noncurrent Less: Valuation allowances Deferred Tax Assets Value Added Tax Refund Deferred Tax Assets Value Added Tax Refund VAT refund Deferred Tax Liabilities, Gross, Classification [Abstract] Non-current Deferred Tax Liabilities, Gross, Noncurrent Deferred tax liabilities Total non-current deferred tax liabilities Deferred Tax Liabilities, Intangible Assets and Internally-Developed Software Deferred Tax Liabilities, Intangible Assets and Internally-Developed Software Intangible assets and internally-developed software Deferred Tax Liabilities, Undistributed Foreign Earnings Outside basis difference Represents the amount of deferred tax liability provided on the outside basis difference for the remaining undistributed earnings. Deferred Tax Liability Provided on Outside Basis Difference for Remaining Undistributed Earnings Outside basis difference Deposits Assets, Current Rental deposits Depreciation Depreciation expense Depreciation of property and equipment Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Share-Based Compensation Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Fiscal Period Focus Document Fiscal Period Focus Document Fiscal Year Focus Document Fiscal Year Focus Document Information [Line Items] Document Information [Line Items] Document Information [Table] Document Information [Table] Document Period End Date Document Period End Date Document Type Document Type Due from Affiliate, Current Amounts due from PRC subsidiaries Due from Employees, Current Staff advances Due from Related Parties, Current Amounts due from related parties, current Due from Related Parties, Noncurrent Amounts due from related parties, non-current Due to Affiliate, Current Inter-company payables Due to subsidiaries Inter-company balances between VIE and WFOE and Autohome HK Due to Related Parties, Current Amounts due to related parties Due to Related Parties Amounts due to related parties Earliest Tax Year [Member] Earliest Tax Year [Member] Earnings Per Share [Abstract] Earnings per share for ordinary shares: Earnings Per Share, Basic Basic Basic earnings per share Earnings Per Share, Basic [Abstract] Basic earnings per share: Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted Diluted Diluted earnings per share Earnings Per Share, Diluted [Abstract] Diluted earnings per share: Earnings Per Share, Policy [Policy Text Block] Earnings Per Share Earnings Per Share [Text Block] Earnings Per Share Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Percentage of PRC income tax Statutory EIT rate Effect of Exchange Rate on Cash and Cash Equivalents, Continuing Operations Effect of exchange rate changes on cash and cash equivalents Electric Generation Equipment [Member] Electric Equipment [Member]